R-ggplot2作图，为什么数值会直接标到标度上

ggplot(data = PAK,
       aes(x = `Indicator Code`,
           y = SP.POP.TOTL))+
  geom_point(size = 0.5)+
  labs(title = 'Total Population of Pakistan',
       x = 'YEAR',
       y = 'POPULATION')

https://blog.csdn.net/u011596455/article/details/79574019